CN105137267A - Test device for directly measuring leakage current of test sample and wirelessly outputting data - Google Patents
Test device for directly measuring leakage current of test sample and wirelessly outputting data Download PDFInfo
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- CN105137267A CN105137267A CN201510553391.4A CN201510553391A CN105137267A CN 105137267 A CN105137267 A CN 105137267A CN 201510553391 A CN201510553391 A CN 201510553391A CN 105137267 A CN105137267 A CN 105137267A
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Abstract
The invention discloses a test device for directly measuring the leakage current of a test sample and wirelessly outputting data. The test device comprises a host computer, a DC high-voltage generator, a high-voltage test wire, a current acquiring module, and an insulated support structure. The top end of the high-voltage test wire is connected with the current acquiring module. The bottom end of the high-voltage test wire is connected with the DC high-voltage generator. The current acquiring module is connected with a semicircular metallic hook. The bottom end of the current acquiring module is connected with the high-voltage test wire. The lower part of the current acquiring module is fixed to the top end of an insulated hollow cylinder. The insulated hollow cylinder on the upper part of the insulated support structure is supported on the side surface of the test sample in virtue of an insulated support. The bottom end of an insulated support rod on the lower part of the insulated support structure is supported on the ground. A top binding post of the DC high-voltage generator is connected with the bottom end of the high-voltage test wire. The test device may prevent the leakage current of a test wire from influencing the accuracy of a test result and reduces an electric shock risk of electrical test workers.
Description
Technical field
The present invention relates to a kind of test unit testing test product Leakage Current, specifically one directly measures leakage current values at test specimen high-pressure side, and wireless mode sends the test unit of data message to main frame, be applicable to the product such as lightning arrester, straight bottle, sleeve pipe and mutual inductor.
Background technology
At present, other power products such as lightning arrester, often need to test its Leakage Current, generally there is following shortcoming:
1, the leakage current on Hi-pot test line affects measuring accuracy
In the past when measuring test product leakage current values, Hi-pot test line also there will be leakage current, affected the accuracy of measurement result.
2, adopt manpower to support test lead by insulating bar, electric shock has a big risk
Usually adopted manpower to support test lead by insulating bar, personnel get an electric shock and have a big risk in the past.
Therefore, in the urgent need to a kind of proving installation easy to use.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of improve Leakage Current measuring accuracy, structure simple and easy to operate directly measure test product leakage current and the test unit of wireless output data.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind ofly directly measure test product leakage current and the test unit of wireless output data, and its gordian technique is: it comprises main frame, high voltage direct current generator, Hi-pot test line, current acquisition module, insulating supporting structure and hangs on the half-round metal hook on the connection terminal on test product top;
Described Hi-pot test line upper end connects current sample module, and lower end connects high voltage direct current generator, and its upper semisection is supported by the inner chamber of the empty cylinder of the insulation on the top of insulating supporting structure, and lower semisection is freely hanging at below the empty cylinder of insulation on the top of insulating supporting structure;
Described current acquisition model calling half-round metal hook, the lower end of current acquisition module connects Hi-pot test line, and current acquisition module bottom is fixed on the upper end of the empty cylinder that insulate;
The empty cylinder of insulation on the top of described insulating supporting structure is supported on the sideway stance of test product by insulating support, the insulating support rod lower end of insulating supporting structure bottom is supported on ground;
The top connection terminal of described high voltage direct current generator connects the lower end of Hi-pot test line, and bottom high voltage direct current generator, AC high frequency power source input port is connected to the high frequency electric source delivery outlet of the high-frequency transformer of main frame by insulated conductor.
Described main frame comprises the 2nd CPU, DC pulse generator, high-frequency transformer, control panel and wireless data receipt modules; A described CPU connects the corresponding port of DC pulse generator, wireless data receipt modules and control panel respectively; The respective input of the output termination high voltage direct current generator of described high-frequency transformer, the corresponding output end of the input termination high voltage direct current generator of described high-frequency transformer;
The high direct voltage that described high voltage direct current generator exports adds to the high-pressure side of test product through current sample module;
The earth terminal ground connection of described high voltage direct current generator.
Described current acquisition module comprises sampling resistor, wave filter, A/D converter, a CPU and wireless data transmission module;
Described filter input end connects sampling resistor two ends, and described filter output connects the input end of A/D converter, and the output terminal of described A/D converter connects CPU, and the input end of described wireless data transmission module is connected to the corresponding output end of a CPU;
Described wireless data transmission module and wireless data receipt modules wireless connections.
Described insulating supporting structure comprises insulation empty cylinder, the insulating support in centre position and the insulating support rod of bottom on top;
The empty cylinder of described insulation is divided into upper and lower two sections of being hinged, the top of epimere and half-round metal are linked up with reliable fixing, the epimere of the empty cylinder of described insulation is connected through the hinge insulating support, described insulating support is resisted against on test product, insulate the hypomere of empty cylinder and insulating support rod hinged, described insulating support rod lower end abutment is on the ground; The upper semisection of described Hi-pot test line penetrates its inner chamber through empty cylinder lower end perforate of insulating, then is connected to current acquisition module through the inner chamber of the empty cylinder of insulation.
The beneficial effect adopting technique scheme to produce is:
1. the leakage current eliminated on Hi-pot test line affects measuring accuracy
In the past when measuring test product leakage current values, microampere meter was connected to high voltage direct current generator top, because of the leakage current on Hi-pot test line, usually caused measurement result inaccurate.Now current acquisition module (microampere meter) is directly placed in test specimen high-pressure side, detected current value is not by wire but is wirelessly uploaded to main frame, survey current value and be test specimen real current value, thus improve the accuracy of test result.Directly measure test product leakage current and the test unit of wireless output data by applying, leakage current testing accuracy reaches 100%.On-the-spot leakage current testing efficiency improves 50%.
2. adopt this insulating supporting structure, prevent field staff from getting an electric shock
Usually adopted manpower to support test lead by insulating bar, personnel get an electric shock and have a big risk in the past.Now adopt this insulating supporting structure, effectively reduce personal electric shock risk.
3. under successfully solving high voltage, the leakage current of heavy dirty test product measures problem
Measure heavy dirty test product leakage current under high voltage, because stray current is large, be difficult to ensure that detected current value is accurate.Now by current acquisition module is put, wireless data uploads, and effectively reduces the impact of stray current, thus reliably the measuring of leakage current of heavy dirty test product under achieving high voltage.Adopt the present invention to avoid the leakage current on test lead affect the accuracy of test result, reduction electrical test personnel get an electric shock risk simultaneously.
Accompanying drawing explanation
Fig. 1 is field wiring schematic diagram of the present invention;
Fig. 2 is measuring principle block diagram of the present invention;
Fig. 3 is the theory diagram of this current acquisition module.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed.
See accompanying drawing 1-accompanying drawing 3, the present embodiment is made up of main frame 1, high voltage direct current generator 13, Hi-pot test line 7, current acquisition module 5, insulating supporting structure 31 5 part, then through centralized integration, carries out test operation by the control panel 21 of main frame 1.
Described Hi-pot test line 7 upper end connects current sample module 5, lower end connects high voltage direct current generator 13, its upper semisection is supported by the inner chamber of the empty cylinder 32 of the insulation on the top of insulating supporting structure 31, and lower semisection is freely hanging at below the empty cylinder 32 of insulation on the top of insulating supporting structure 31;
Described current acquisition module 5 connects half-round metal hook 6, and lower end connects Hi-pot test line 7, and its underpart is reliably fixed on empty cylinder 32 upper end of insulation on the top of insulating supporting structure 31; Half-round metal hook 6 can hang on the connection terminal on test specimen 9 top; The empty cylinder 32 of insulation on the top of insulating supporting structure 31 relies on insulating support 8 to be supported on the sideway stance of test specimen 9, and bottom insulating support rod 33 lower end is put ground and is support with ground; High voltage direct current generator 13 top connection terminal 15 connects Hi-pot test line 7 lower end, and AC high frequency power source input port, bottom 14 is connected to the high frequency electric source delivery outlet 3 of main frame 1 by special isolation wire 17.
Described main frame 1 comprises CPU18, DC pulse generator 19, high-frequency transformer 20, control panel 21 and wireless data receipt modules 22; Described CPU18 connects DC pulse generator 19, wireless data receipt modules 22, control panel 21; High-frequency transformer 20 connects DC pulse generator 19, high voltage direct current generator 13.
See accompanying drawing 3, described current acquisition module 5 is made up of sampling resistor 26, wave filter 27, A/D converter 28, CPU29, wireless data transmission module 30; Wave filter 27 input end connects sampling resistor 26 two ends, and wave filter 27 output terminal connects the input end of A/D converter 28, and the output terminal connecing A/D converter 28 connects CPU29, and the input end of wireless data transmission module 30 is connected to CPU29.The high direct voltage that high voltage direct current generator 13 exports is after the high-pressure side that current sample module 5 adds to test product 25, and the leakage current that test product 25 flows through flows through the sampling resistor 26 in current sample module 5, as shown in Figure 3.The input end of the sampled voltage input filter 27 at sampling resistor two ends carries out filtering.The input end of the sampled voltage input a/d converter 28 that wave filter 27 exports, is converted to digital signal.Digital voltage signal inputted CPU29 the calculating of converter 28, draw leakage current result, export wireless data transmission module 30 to, leakage current signal is wirelessly sent to the wireless data receipt modules 22 of main frame 1 by wireless data transmission module 30, as shown in Figure 2.
Described insulating supporting structure 31 comprises the empty cylinder 32 of insulation on top, the insulating support 8 in centre position and bottom insulating support rod 33;
Empty cylinder 32 top of insulation on top and half-round metal are linked up with 6 and are reliably fixed; Insulating support 8 and the empty cylinder 32 of the insulation on top by the larger chain connection of resistance, the opening angle between the empty cylinder 32 of insulation on adjustable insulating support 8 and top; The empty cylinder 32 lower end perforate of the insulation of upper semisection through top of Hi-pot test line 7 penetrates the inner chamber of the empty cylinder 32 that insulate, then is connected to current acquisition module 5 through the inner chamber of the empty cylinder 32 of insulation; The empty cylinder 32 of insulation on top is divided into upper and lower two sections, and use the chain connection that resistance is larger between the two, the angle of bend between upper and lower two sections of adjustable, Hi-pot test line 7 adopts wire jumper to connect through above-mentioned hinge position.
Suitably adjust insulating support 8 and the opening angle of insulating supporting structure 31 according to the umbrella skirt construction of test specimen 9 before test, can be supported on the full skirt of test specimen 9.Hold insulating supporting structure 31, make the metal hanger 6 on its top be fixed on the connection terminal on test product 9 top, insulating support 8 secure support is on the full skirt of test specimen 9.Can loose one's grip after insulating support rod 33 lower end of insulating supporting structure 31 bottom is placed in ground the most at last, independently support fixing by insulating supporting structure 31.
See accompanying drawing 2, during work, the 2nd CPU18 can control the amplitude that DC pulse generator 19 exports pulse, and the output pulse amplitude setting range of DC pulse generator 19 is 0 ~ 200V, and frequency is 20kH.The pulsating wave that DC pulse generator 19 exports boosts through high-frequency transformer 20, and voltage magnitude increases to original 25 times.The high-frequency ac current that high-frequency transformer 20 exports passes into the input end of high voltage direct current generator 13, through di-cap 60 times of booster circuit rectifier boost, becomes high-voltage direct current.DC voltage setting range is 0 ~ 300kV.The high direct voltage that high voltage direct current generator 13 exports adds to the high-pressure side of test product 25 through current sample module 5.High voltage direct current generator 13 bottom is support 12.
The leakage current signal of reception is transferred to the CPU18 of main frame 1 by wireless data receipt modules 22, finally carries out data display and printing through control panel.
The module such as the high voltage direct current generator mentioned herein, DC pulse generator, wireless data receipt modules, wireless data transmission module, a CPU, the 2nd CPU, high-frequency transformer, wave filter, A/D converter or device tool adopt existing conventional device on the market.
Such as high voltage direct current generator can adopt the ZGF series high voltage direct current generator of magnificent sky electrical production;
Single-phase, three or female type wave filter that wave filter can adopt Kunshan De Feier Electronic Science and Technology Co., Ltd. to produce.The DC pulse generator that DC pulse generator can adopt Shanghai Dong Mao Electronic Science and Technology Co., Ltd. to produce.High-frequency transformer can adopt the transformer of Jieyang market day forceful electric power gas company limited production.The supporting wireless transmit that receive data by wireless and transmitter module can adopt intelligence AMP Electronics Co., Ltd. of Shenzhen to produce and receiver module, transmitter module as high-power in ZF-9, ZR8-J receiver module.
a/D converter can adopt the A/D converter of AC-DC module or Shenzhen lattice electron company limited production liking that general electronics is produced, and certain above-mentioned module adopts other products good, meets request for utilization.
Described control panel 21 comprises display screen and exports output device accordingly, or is touch-screen, or is man-machine interaction control interface etc., and exporting output device is keyboard, mouse or button etc.One CPU, the 2nd CPU can adopt single-chip microcomputer, as MSP430 single-chip microcomputer, or the single product machine of STC single-chip microcomputer series, its up-to-date model---STC12C5A60S2(macrocrystalline science and technology is produced) etc., meet request for utilization.
Using method when using the present embodiment to test is as follows:
1, suitably adjust insulating support 8 and the opening angle of insulating supporting structure 31 according to the umbrella skirt construction of test specimen 9 before test, can be supported on the full skirt of test specimen 9.Hold insulating supporting structure 31, make the metal hanger 6 on its top be fixed on the connection terminal on test product 9 top, insulating support 8 secure support is on the full skirt of test specimen 9.Can loose one's grip after insulating support rod 33 lower end of insulating supporting structure 31 bottom is placed in ground the most at last, independently support fixing by insulating supporting structure 31.
2, use grounding copper braided wire to be connected between the ground terminal of on-the-spot earth terminal and main frame 1, high voltage direct current generator 13, test product 9, and confirm to connect good, reliable.
3, Hi-pot test line 7 lower end is connected on the connection terminal of high voltage direct current generator 13 top.
4, the AC high frequency power source input port 14 bottom the high frequency electric source delivery outlet 3 using special isolation wire 17 to connect main frame 1 and high voltage direct current generator 13.
5, open main frame 1, according to the testing standard of test specimen 9, apply high direct voltage to it.CPU18 controls DC pulse generator 19, progressively improves DC pulse amplitude, and then is progressively exerted pressure to test product 9 by high-frequency transformer 20, high voltage direct current generator 23.
The high direct voltage that high voltage direct current generator 13 exports is after the high-pressure side that current sample module 5 adds to test product 25, and the leakage current that test product 25 flows through flows through the sampling resistor 26 in current sample module 5, as shown in Figure 3.The input end of the sampled voltage input filter 27 at sampling resistor two ends carries out filtering.The input end of the sampled voltage input a/d converter 28 that wave filter 27 exports, is converted to digital signal.Digital voltage signal is inputted CPU29 calculating of converter 28, draws leakage current result, exports wireless data transmission module 30 to, as shown in Figure 3.Leakage current signal is wirelessly sent to the wireless data receipt modules 22 of main frame 1 by wireless data transmission module 30, as shown in Figure 2.
The leakage current signal of reception is transferred to the CPU18 of main frame 1 by wireless data receipt modules 22, finally carries out data display and printing through control panel.
One-piece construction of the present invention is fairly simple, can promote the use of on the multiple products such as lightning arrester, has following feature:
(1) leakage current testing precision is improved
Current acquisition module 5 is directly placed in test specimen high-pressure side, and detected current value is not by wire but is wirelessly uploaded to main frame, survey current value and be test specimen real current value, thus improve the accuracy of test result.
(2) adopt this insulating supporting structure, reduce electric shock risk
Now adopt this insulating supporting structure, in leakage current testing process, electrical test personnel are without the need near electrification in high voltage position, and effective reduction personnel get an electric shock risk.
(3) under solving high voltage, the leakage current of heavy dirty test product measures problem
By current acquisition module 5 is put, wireless data uploads, and effectively reduces the impact of stray current, thus reliably the measuring of leakage current of heavy dirty test product under achieving high voltage.
(4) test figure automatic analysis function is increased
The present invention improves further also can have following effect: automatically get a little in test process, automatically draw voltage after test---and current curve, significantly strengthens the systematic analysis ability to test figure.
Voltage---the function of current curve is drawn in original creation.Measuring in leakage current process, take certain voltage as step-length, record current value, and after having tested, test macro completes voltage automatically---current curve is drawn.Electrical test personnel are by voltage---the defects such as current curve Timeliness coverage equipment makes moist, crackle.By observing voltage---the current curve of measuring process, even if the data recorded are not overproof, by analytical voltage yet---the feature of current curve, the plant issue that Timeliness coverage is hidden.
Claims (5)
1. directly measure test product leakage current and a test unit for wireless output data, it is characterized in that: it comprises main frame (1), high voltage direct current generator (13), Hi-pot test line (7), current acquisition module (5), insulating supporting structure (31) and hangs on half-round metal hook (6) on the connection terminal on test product (9) top;
Described Hi-pot test line (7) upper end connects current sample module (5), lower end connects high voltage direct current generator (13), its upper semisection is supported by the inner chamber of the empty cylinder (32) of the insulation on the top of insulating supporting structure (31), and lower semisection is freely hanging at empty cylinder (32) below of insulation on the top of insulating supporting structure (31);
Described current acquisition module (5) connects half-round metal hook (6), and the lower end of current acquisition module (5) connects Hi-pot test line (7), and current acquisition module (5) bottom is fixed on the upper end of the empty cylinder of insulation (32);
The empty cylinder (32) of insulation on described insulating supporting structure (31) top is supported on the sideway stance of test product (9) by insulating support (8), insulating support rod (33) lower end of insulating supporting structure (31) bottom is supported on ground;
The top connection terminal (15) of described high voltage direct current generator (13) connects the lower end of Hi-pot test line (7), and high voltage direct current generator (13) AC high frequency power source input port, bottom (14) is connected to the high frequency electric source delivery outlet (3) of the high-frequency transformer (20) of main frame (1) by insulated conductor (17).
2. according to claim 1ly directly measure test product leakage current and the test unit of wireless output data, it is characterized in that: described main frame (1) comprises control panel (21), a CPU(18), DC pulse generator (19), high-frequency transformer (20) and wireless data receipt modules (22);
Described control panel (21) and wireless data receipt modules (22) meet a CPU(18 respectively) respective input, a described CPU(18) the input end of output termination DC pulse generator (19), the input end of the output termination high-frequency transformer (20) of described DC pulse generator (19), the input port of high voltage direct current generator (13) described in the output termination of described high-frequency transformer (20);
A described CPU(18) connect the corresponding port of DC pulse generator (19), wireless data receipt modules (22) and control panel (21) respectively; The respective input of the output termination high voltage direct current generator (13) of described high-frequency transformer (20), the corresponding output end of the input termination high voltage direct current generator (13) of described high-frequency transformer (20);
The high direct voltage that described high voltage direct current generator (13) exports adds to the high-pressure side of test product (25) through current sample module (5);
Earth terminal (16) ground connection of described high voltage direct current generator (13).
3. according to claim 2ly directly measure test product leakage current and the test unit of wireless output data, it is characterized in that: described current acquisition module (5) comprises sampling resistor (26), wave filter (27), A/D converter (28), the 2nd CPU(29) and wireless data transmission module (30);
The respective end of the input termination test product (9) of described sampling resistor (26), the input end of the output termination wave filter (27) of described sampling resistor (26), the input end of the output termination A/D converter (28) of described wave filter (27), output termination the 2nd CPU(29 of described A/D converter (28)) input end, described 2nd CPU(29) output termination wireless data transmission module (30); Described wireless data transmission module (30) is connected with described wireless data receipt modules (22) by the mode of wireless transmission;
Described wave filter (27) input end connects sampling resistor (26) two ends, described wave filter (27) output terminal connects the input end of A/D converter (28), the output terminal of described A/D converter (28) connects CPU(29), the input end of described wireless data transmission module (30) is connected to a CPU(29) corresponding output end;
Described wireless data transmission module (30) and wireless data receipt modules (22) wireless connections.
4. according to claim 1ly directly measure test product leakage current and the test unit of wireless output data, it is characterized in that: described insulating supporting structure (31) comprises the empty cylinder (32) of insulation on top, the insulating support (8) in centre position and the insulating support rod (33) of bottom;
The empty cylinder of described insulation (32) is divided into upper and lower two sections of being hinged, the top of epimere and half-round metal are linked up with (6) and are reliably fixed, the epimere of the empty cylinder of described insulation (32) is connected through the hinge insulating support (8), described insulating support (8) is resisted against on test product, insulate the hypomere of empty cylinder (32) and insulating support rod (33) hinged, described insulating support rod (33) lower end abutment is on the ground; The upper semisection of described Hi-pot test line (7) penetrates its inner chamber through empty cylinder (32) lower end perforate of insulating, then is connected to current acquisition module (5) through the inner chamber of the empty cylinder of insulation (32).
5. according to claim 2ly directly measure test product leakage current and the test unit of wireless output data, it is characterized in that: described control panel comprises display screen and IO interface, or touch-screen, or be human-computer interaction interface.
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Cited By (1)
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| CN113075507A (en) * | 2021-03-29 | 2021-07-06 | 云南电网有限责任公司曲靖麒麟供电局 | High-voltage measuring device |
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Address after: No. 66, Hongqi Street, Shijiazhuang, Hebei Province Applicant after: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. SHIJIAZHUANG POWER SUPPLY BRANCH Applicant after: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. Applicant after: State Grid Corporation of China Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Applicant before: State Grid Corporation of China Applicant before: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. Applicant before: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. SHIJIAZHUANG POWER SUPPLY BRANCH Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Applicant after: State Grid Corporation of China Applicant after: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. Applicant after: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. SHIJIAZHUANG POWER SUPPLY BRANCH Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Applicant before: State Grid Corporation of China Applicant before: STATE GRID HEBEI ELECTRIC POWER Co. Applicant before: STATE GRID HEBEI SHIJIAZHUANG ELECTRIC POWER SUPPLY Co. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |